window.addEvent('domready', function() {
	var num_po = $('num_po');
	if (num_po) {
		var json = new Json.Remote("/count_po.json.php", {onComplete:function(rsp){
			if (rsp) {
				var cnt = rsp.num_po;
				if (cnt) {
					num_po.setHTML('');
					num_po.appendText(cnt);
					num_po.title = rsp.desc;
					num_po.style.display = 'block';
				}
			}
		}}).send();
	}
});